Using a small portable device like that for a shopping list is reasonable but using a full sized iPad is ridiculously show-offish.
@cbae:You know who else had a comb-over?
Anywho, I love using OneNote for groceries and a 'todo' list for chores and stuff I need to get done. Hell, I have 3 different work outs that I do and they're listed as tables in one-note so I can use the phone and keep track.
Goofy, yes, but I just don't have the memory cells that I used to have. Plus, my printer broke, and I"m trying to see if I can make it 6 months without one. Most of the stuff I printed was a waste.